185 degrees. The wind furnace was originally a special furnace for boiling tea in Tang Dynasty. Lu Yu recorded in the Book of Tea that "the wind furnace is copper and iron, like an ancient tripod". The baking temperature of Danish horn in air furnace is 185℃. Danish croissant is a kind of multi-layer bread, which is made of fermented dough wrapped in ghee, pressed, rolled thin and folded many times.